Stop the talbiya. Stand in line with the Black Stone (marker on the floor and the wall), the Kaaba on your left. Each time you pass the Black Stone, turn towards it and say “Allāhu akbar” (touch or kiss it only if possible without pushing). Complete 7 full circuits anticlockwise, passing outside the Hijr Ismail (the semicircle). Men: right shoulder uncovered (idtibaʿ) and brisk pace for the first 3 circuits (ramal) if the crowd allows. Between the Yemeni corner and the Black Stone, recite “Rabbanā ātinā…”. Otherwise: free supplications, Quran, dhikr.
Schools differRitual purity: required for the validity of tawaf according to the Maliki, Shafiʿi and Hanbali schools; the Hanafi school considers it obligatory but a tawaf done without ablution remains valid with compensation. Doubt about the number of circuits: the majority keeps the certain (lower) number. Without ruling: follow your guide.